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Upper
& Lower Kelly Valves
Parts Assembly
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To reassemble, place the body with
the "upper end" down. The seat with new rings should be
placed snugly inside the housing (with the Teflon seal ring facing
up).
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The operating stem (with new
ring) should be put into place in the closed position. The ball
will then slide easily into the stem cog.
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With the seat housing
"up" on the double-pin sub, install the corrugated spring
and the lower seat.
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Lubricate the threads and shoulders
(to prevent thread damage), rejoin the two body pieces, and tighten
with chain tongs. Install a grease zert in the body. Use a heavy-duty,
water-repellent grease and grease the valve thoroughly. Remove the grease zert and install
the plug.
The valve is now ready to be pressure-tested and placed back in
service or stored for future use. When the valve is returned to the
drill string, remember to make-up the two body pieces using the
pipe tongs and the proper amount of torque for similar size drill
collar connections.
Routine Maintenance
Lubrication
WNCO VALVE'S kelly valves are designed with a grease fitting
located opposite the stem. At least three times a week, remove the plug,
install the zert and lubricate with a heavy-duty, water-repellent grease.
Replace the plug before resuming operation.
TIP: Always grease the valve thoroughly and operate the stem
several times after removing the valve from the drill string, even if
only storing the valve for a short period of time. This will help prevent
drilling mud from setting up inside the valve and "freezing" the
ball and stem.
OPERATION
Open and close the valve two or three times a week to help keep
the parts free of debris. NEVER operate the valve in a partially open or
closed position; always open or close the valve fully.
Testing
Check the connections and pressure test regularly just as you
would with all BOP equipment. Pressure test from the pin end as
recommended by API Spec 7.
WNCO VALVE'S kelly valves are precision
manufactured to provide maximum life with a minimum of maintenance. By
following these routine procedures, longer and more trouble-free operation
is assured.
SUMMARY
Routine Maintenance
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Do not tong on the stem area.
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Grease the valve regularly, at
least three times a week.
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Use only water-repellent grease.
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Open and close the valve often to
prevent accumulations of debris.
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Check connections and pressure test
regularly.
Field Repair
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Break the valve at the mid-body
connection when removing from the drill string for repairs.
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Remove all rings and seals and
replace with new, even if they do not appear to be worn.
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Metal parts may be reused if wear
has not occurred.
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Install parts with seals carefully
to avoid seal damage (use a light coating of grease).
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Handle threads with care.
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Grease the valve thoroughly before
placing in operation.
Quality WNCO VALVE Parts and
Replacement Kits
A complete inventory of replacement
parts for every model WN-2 valve is in stock at all times so there's never
a delay, never a wait. You can be sure of proper fit and easy replacement
in the field since all the parts are precision milled or fabricated to
original equipment specifications. It is recommended that a complete parts
kit be on location at all times to minimize costly downtime.
Dependable Service and Repair
There are times when the condition of a
valve warrants sending it to the shop. When that happens you can depend on
WNCO VALVE to provide expert repair service, regardless of the brand. From
minor repairs to major overhauls, each job receives the same attention to
detail found in every WNCO VALVE Product.
INSPECTION
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Carefully inspect all metal parts
for wear, nicks, scraper of deep abrasions, and replace if necessary.
Remove all the o-rings and seals from the seats and stem, and install
new WN-2 replacements.
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Carefully check the stem hole in
the body for damage. Buff out the hole to remove any corrosion, being
careful not to remove too much metal. It is important that this
surface is clean and smooth before reassembly.
NOTE: If fluid has caused any washed areas in the stem hole, if any
cracks are found in the stem hole, or if the stem hole has become too
oversized, the valve should not be reassembled. Instead, return the
valve body to WNCO VALVE for repair. Often the body can be repaired by
machining the stem hole to oversize specifications and install an
appropriate oversize operating stem
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Clean and inspect both pins on the
sub, and both boxes and the operating stem hole in the body as per
standard blacklight, magnetic particle inspection. Either of the
external joints (box or pin) may be reworked if there is enough space
left for tong purposes after the joint is remachined. Under no
circumstances should the internal box of the body be reworked; if this
box is bad, the body must be replaced. On the sub, the modified pin
which holds the internal seat may be reworked, but it will be
necessary to remachine the seat housing as well. In this case, the sub
should be returned to WNCO VALVE for precision machining of the pin
and seat housing. WNCO VALVE cannot warranty machine work performed by
others.
***WARNING If the stem hole is found cracked, even if no
evidence of pressure leakage is detected, the valve body must be
replaced. A crack in the stem area can severely weaken the strength of
the valve body.
WNCO VALVE Recommended Shop
Maintenance - WN-2 15,000 PSI
INSIDE B.O.P. DART VALVE
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Break valve apart and visually
inspect seat and dart for wear, pitting, or excessive use.
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If pitting or wear is very minor,
but valve leaks, you can lap seat and dart back to seal conditions. To
properly lap seat and dart, chuck seat sub portion of valve in lathe.
Use standard lapping compound, and lap seat and dart for good metal to
metal seal.
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If conditions require it, you may
need to replace the seat, dart, spring, or all internal parts. To
remove seat from seat sub, you must heat pin end of seat sub, to
release tension on seat then knock seat out with removal tool and
hammer. When replacing seat, heat seat sub again insert seat, tap it
down, allow to cool for good shrink fit. If old seat cannot be removed
with heat and hammer, you may have to chuck seat sub in the lathe and
cut seal out. New seat and new dart must be lapped for proper seal to
hold pressure.
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Reassemble valve, pressure test,
paint, and chart for use.
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We recommend that the external and
internal connections be inspected on a regular basis. Always perform
inspection every time valve is repaired if possible.
WNCO VALVE Recommended
Procedure for lapping of seat and Dart WN-2 15,000 PSI
METAL TO METAL SEAL INSIDE
B.O.P. DART VALVE
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Clean seat and dart as thoroughly
as possible.
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Chuck seat sub in lathe. Use a reasonable
working R.P.M. to avoid injury or damage.
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Apply lapping compound to seat
area.
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Hold dart nose against seat
area until metal seal is formed. It should create a slightly sticky
pull or bond.
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If it is necessary to machine the
seat area to secure a good bond after lapping; be sure to cut the very
same angle on seat as O.E.M. cut new (be accurate in you measurements).
WNCO Valve's WN-1 Valves
Service & Maintenance
WNCO Valve's kelly valves are design
engineered and manufactured to provide maximum life and minimum
maintenance. At the heart of every WNCO Valve is the new WN-1 seal system.
The double backup ring arrangement evenly distributes the sealing load for
a more positive seal, resulting in longer o-ring life, reducing
maintenance and increased reliability. This extra back-up protection,
combined with tough, smooth Teflon seals between the ball valve and seat,
provides the maximum resistance to corrosion and abrasion.
Types Of Repairs:
SEALS AND RINGS: Replacement of o-rings, backup rings, Teflon seals
and the stem o-ring. Regular seal and ring replacement will substantially
extend the life of the valve.
INTERNAL PARTS: Replacement of the spring, seat, ball and stem in addition
to all rings and seals.
NOTE:
When the valve has been properly operating in a partially opened
or closed position or for long periods of use with extremely corrosive
fluids, replacement of all or some internal parts may be necessary. If
internal metal parts show wear, replace them. If not, they may be returned
to the valve. Always replace rings and seals, even if they appear not to
be worn.
Disassembly
For all types of repairs, follow this
step-by-step procedure to insure proper disassembly and reassembly:
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From the box end of the valve,
remove the SNAP RING. Tap out the LOCKING SLEEVE. Loosen, pull (or
tap) to the inside, and remove each of the three pieces of the SPLIT
RETAINING SLEEVE. Tap out the UPPER SEAT using a wooden punch and
being careful not to damage the seat.
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Close the valve with the operating
wrench. It must be in the FULL CLOSED position to remove the
VALVE BALL. Use the wooden punch to knock the ball out the box end of
the body. To remove the OPERATING STEM, fit the operating wrench into
the stem. Knock the stem into the inside of the body by striking the
wrench with a hammer.
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Use the wooden punch to remove the
LOWER SEAT being careful not to damage the seat during removal.
Inspection
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Carefully inspect all metal parts
for wear, nicks, scrapes or deep abrasions and replace if necessary.
Remove ALL o-rings and seals from the seat and stem, and install new
WN-1 replacements,
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Carefully check the stem hole in
the body for damage. Buff out the stem hole to remove any corrosion,
being careful not to remove too much metal. It is important that this
surface is clean and smooth before reassembly. NOTE: If fluid has caused
any washed areas in the stem hole, if any cracks are found in the stem
hole, or if the stem hole has become too oversized, the valve should
not be reassembled. Instead, return the valve body to WNCO Valve for
repair. Often the body can be repaired by machining the stem hole to
oversize specifications and installing an oversize operating stem.
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Clean and inspect the box and pin
connections and the operating stem hole as per standard blacklight, magnetic
particle inspection. Either of the joints may be reworked if there is
enough space left for tong purposes after the joint is remachined. If
the stem hole is found cracked, even if no evidence of pressure
leakage is detected, the valve body must be replaced. A crack in the
stem area can severely weaken the strength of the valve.
Parts Assembly
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Install the wave SPRING and the
LOWER SEAT (with Teflon seal ring facing up). The OPERATING STEM
should be put into place in the CLOSED POSITION. The VALVE BALL will
slide easily into the stem cog. Install the UPPER SEAT (with Teflon
seal facing down).
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Insert the lower 3-jaw puller from
the pin end of the body and grasp the UPPER SEAT with the jaws. Use a
wrench to tighten the nut on the stem of the puller and compress the
internal parts against the spring. Install the three pieces of the
SPLIT RETAINING RING into the body groove and slide the LOCKING SLEEVE
into place inside the split ring. Remove the 3-jaw puller. Install the
snap ring.
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Install a grease zert in the body.
Use a heavy duty water repellent grease and grease the valve
thoroughly. Remove the grease zert and install the plug.
The valve is now ready to be pressure
tested and placed back in service or stored for future use.
Routine Maintenance
Lubrication: All WN-1 kelly
valves are designed with a grease fitting located opposite the stem. At
least three times a week, remove the plug, install the zert and lubricate
with a heavy water repellent grease. Replace plug before resuming
operation.
TIP: Always grease the valve
thoroughly and operate the stem several times after removing the valve
from the drill string, even if only storing the valve for a short period
of time. This will help prevent drilling mud from setting up inside the
valve and freezing the ball and stem.
Operation: Open and close the
valve two or three times a week to help keep the parts free of debris.
NEVER operate the valve in a partially open or closed position; always
open or close the valve fully.
Testing: Check connections
and pressure test regularly just as you would with all BOP equipment.
Pressure test kelly valves according to API Spec. 7.
WN-1 Valves are precision manufactured
to provide maximum life with a minimum of maintenance. Bt following these
routine procedures, longer and more trouble free operation is assured.
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